catena-Poly[[(1,10-phenanthroline-kappa N-2,N ` )lead(II)]-mu-azido-kappa N-2(1):N-3-mu-nitrito-kappa O-3,O `:O `-[(1,10-phenanthroline-kappa N-2,N ` )lead(II)]-di-mu-azido-kappa N-4(1):N-1] - Mohammadnezhad, G.; Ghanbarpour, A.R.; Amini, M.M.; Ng, S.W. (International Union of Crystallography, 2010)